Review on Enhanced Inverter Protection with ZOOKOTO Circuit Breaker by Chris Bowden

I bought this for a 40 amp circuit to run a Segway lift from the back of my car. The breaker has worked and flipped maybe 5 times in total in the last 2 years. .However, a few weeks ago it didn't work and when I tested it there was no continuity, the mechanical movement of the lever and knob was rough and brittle to the touch. Can this be caused by heat damage? (I live in Texas) or maybe dust gets in the cracks over time? Not sure but it was frying my elevator as well, currently trying to diagnose and fix it. So yes, the switch works. But I would consider replacing them after about 18 months as the plastic and overall function seems to be degrading and becoming unusable.